TM 1-1520-240-104-4-1SECTION IV. EXTENDED RANGE FUEL SYSTEM (ERFS) AND ERFS IIWARNINGThe ERFS is a non-crashworthy auxiliaryfuel system. The use of a non-crashworthyinternal extended range fuel system maycompromise the helicopters crashworthi-ness and may increase the risk of burns ina potentially survivable accident.4-4-1. Extended Range Fuel SystemThe ERFS provides mission flexibility asan extended range mission kit and a for-ward area refueling source. The ERFS ismounted on the left side of the cabin be-tween sta 190 and 450, depending on thehelicopter CG limits. The ERFS is a modu-lar, interconnected system composed ofup to four 600 gal non-crashworthy metaltanks, four electrically operated fuelpumps, and a vent system with associatedwiring and plumbing. The tanks are se-cured using 5K and 10K pound cargostraps. The fuel management control pan-el (FMCP) is housed in an aluminum boxand is mounted on the forward most tank.Refer to TM 55-1560-307-13&P for installa-tion, operation, and maintenance proce-dures.WARNINGChains will not be used to tie down theERFS.CAUTIONFMCP will not be operated without fuel inthe tank(s), or with tank cam lever in theCLOSED position.CAUTIONA fuel sample is required before the firstflight of the day.CAUTIONHot refueling is not recommended.NOTEFor clarity, the tanks are numbered front torear 1,2,3,4. In order to maintain helicopterCG, suggested tank burn is 4, 1, 3, 2.4-4-2.Extended Range Fuel System II.The Extended Range Fuel System II (ERFS II) is aninternal tank fuel system that provides the CH-47D withthe ability to fly for an extended period of time withouthaving to land for refueling. The ERFS II may be installedin one, two or three tank applications in addition to theForward Area Refuel Equipment (FARE) kit installation.Through the use of a FARE kit, the CH-47D can also beused to ferry fuel to forward areas to support refuelingoperations of other aircraft and equipment. The systemconsists of five functional components: the fuel tank as-sembly with fuel and vent hoses, restraint system, ERFSII Fuel Control Panel, and FARE kit assembly. Refer-ences and illustrations provided describe the three tankand FARE kit installation. Power is supplied to the ERFSII from the No. 1 DC BUS and No. 1 AC BUS through LHUtility Receptacles and wiring harness to the ERFS IIFuel Control Panel. Refer to TM 55-1520-240-23 and tM1-1560-312-10 for installation and maintenance proce-dures.4-4-3. ERFS Capabilities.a.The ERFS provides up to 2320 gallons, (580 gal-lons maximum per tank) of usable fuel for extendedrange missions.b.The ERFS can be installed, operated, removed,transported, handled, and stored in climatic conditions of32_C to +52_C.c.The ERFS can be installed and used in a one tankor multiple tank configuration as the mission requires.d.Fuel quantity can be accurately monitored inflight within four percent of the actual quantity using theliquid level indicators.e.The ERFS can be refueled using the splash fill orpressure fill techniques.f.The system can also be defueled using standardequipment.g.The ERFS has redundant fuel feed capability inall pump/tank combinations.h.Fuel transfer pump system can operate withAPU, engine, or external power applied.i.The ERFS can be used as a forward area refuel-ing equipment (FARE) system, providing 2320gallons offuel for refueling other helicopters.4-4-4. Fuel Tank Assembly.The ERFS II fuel tank assembly consists of an outeraluminum honeycomb and fiberglass shell container,ballistically self-sealing bladder, plumping module, fuelhose, vent hose assembly, and ground cable. Each tankmeasures 58 inch L x 62 inch W x 64 inch H with the